On 16 November 2016 at 21:47, David Howells <dhowells@xxxxxxxxxx> wrote:
> From: Josh Boyer <jwboyer@xxxxxxxxxxxxxxxxx>
>
> UEFI machines can be booted in Secure Boot mode. Add a EFI_SECURE_BOOT bit
> for use with efi_enabled.
>
> Signed-off-by: Josh Boyer <jwboyer@xxxxxxxxxxxxxxxxx>
> Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
> ---
>
> arch/x86/kernel/setup.c | 1 +
> include/linux/efi.h | 1 +
> 2 files changed, 2 insertions(+)
>
> diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
> index 9521acce8378..539f29587712 100644
> --- a/arch/x86/kernel/setup.c
> +++ b/arch/x86/kernel/setup.c
> @@ -1164,6 +1164,7 @@ void __init setup_arch(char **cmdline_p)
> if (boot_params.secure_boot &&
> IS_ENABLED(CONFIG_EFI_SECURE_BOOT_LOCK_DOWN)) {
> lock_kernel_down();
> + set_bit(EFI_SECURE_BOOT, &efi.flags);
Why is this x86 only? And why is this bit only set if
CONFIG_EFI_SECURE_BOOT_LOCK_DOWN is enabled?
> pr_info("Secure boot enabled\n");
> }
>
> diff --git a/include/linux/efi.h b/include/linux/efi.h
> index 11372fb8784c..5d7fb3e3400b 100644
> --- a/include/linux/efi.h
> +++ b/include/linux/efi.h
> @@ -1079,6 +1079,7 @@ extern int __init efi_setup_pcdp_console(char *);
> #define EFI_ARCH_1 7 /* First arch-specific bit */
> #define EFI_DBG 8 /* Print additional debug info at runtime */
> #define EFI_NX_PE_DATA 9 /* Can runtime data regions be mapped non-executable? */
> +#define EFI_SECURE_BOOT 10 /* Are we in Secure Boot mode? */
>
> #ifdef CONFIG_EFI
> /*
>
> --
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